CN101707818B - High-frequency induction heating device for thermally-drawing roller, heat-conducting disc or drying drum - Google Patents
High-frequency induction heating device for thermally-drawing roller, heat-conducting disc or drying drum Download PDFInfo
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- CN101707818B CN101707818B CN2009102593763A CN200910259376A CN101707818B CN 101707818 B CN101707818 B CN 101707818B CN 2009102593763 A CN2009102593763 A CN 2009102593763A CN 200910259376 A CN200910259376 A CN 200910259376A CN 101707818 B CN101707818 B CN 101707818B
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Abstract
The invention discloses a high-frequency induction heating device for a thermally-drawing roller, a heat-conducting disc or a drying drum, which comprises a heating unit and a control unit, wherein the heating unit is a multi-stage high-frequency heater and comprises heating coils arranged on the thermally-drawing roller, heat-conducting disc or drying drum; and the control unit is a high-frequency electromagnetic induction control circuit in which a controlled high-frequency soft switch power supply drives the heating coils in a power regulation mode to form a high-frequency eddy current for heating on the heated thermally-drawing roller, heat-conducting disc or drying drum. The multi-stage high-frequency heater comprises a framework and magnetizers; the heating coils are an electromagnetic coils; the framework has a hollow cylindrical structure; a plurality of magnetizers made of a nano super microcrystalline material are sleeved outside the framework along an axial direction; and each magnetizer is wounded with an electromagnetic coil. The high-frequency induction heating device of the invention has a simple structure, small energy consumption, high thermal efficiency and no pollution and can be widely used in thermally-drawing rollers, heat-conducting discs or drying drums of thermal compound equipment.
Description
Technical field
The present invention relates to a kind of heater, especially a kind of high-frequency induction heating apparatus that is used for heat-stretching roller, thermal conductance dish or drying cylinder, this heater is applied in the industries such as chemical fibre, spinning, printing and dyeing, papermaking.
Background technology
Traditional hot pressing mainly is to adopt the electric energy mode of heating with roller, and this mode is difficult to accurately control temperature, easily causes local temperature not reach the design and use requirement, or owing to crosses the be heated surface quality of fabric and paper of thermal impact.In addition, adopt the energy consumption of common electric energy mode of heating higher, and the work noise of warm-up mill cylinder device is bigger.
The present warm-up mill cartridge that comparatively generally uses, be to adopt the roller that drives by reducing motor, be provided with conductive coil in roller inside, by common electric energy heating roller surface, thereby in the roller rotation, fabric, paper surface through equipment such as chemical fibre spinning are cured and roll extrusion.
Application number is that 200920088494.8 Chinese patent has been announced a kind of directly-heated type roller, and it comprises outer cylinder body, is installed in inner barrel in the outer cylinder body by bearing with relative revolution and coaxial line mode; Outer surface around inner barrel is enclosed with magnetic layer, twines induction coil outside magnetic layer; Described induction coil is electrically connected with high frequency electric source by lead, and the electromagnetic energy of utilizing induction coil to produce is directly generated heat roller.
Application number is that 200720053740.7 Chinese patent has been announced the electromagnetic vortex induction heating type roller cylinder that a kind of hot pressing is used, it comprises the rotation roller, the left and right two ends of rotating roller are provided with plug, rotate in the roller and be provided with the interior pipe that solderless wrapped connection has coil groups, the lead of coil groups passes left and right plug and is connected with power supply; This product adopts magnetic field induction eddy current heating principle, at first the industrial-frequency alternating current with electrical network becomes direct current, by control circuit this direct current is become high-frequency alternating current again, this high-frequency alternating current is by solderless wrapped connection loop coil group on inner pipe, make it to produce high-frequency alternating magnetic field, when this action of alternating magnetic field rotates roller in ferrous substrate, produce countless little eddy current, rotation roller itself is generated heat voluntarily to the temperature of controller appointment.
More than the simple energy consumption of project organization of two induction heating equipmentes little, but along with the improving constantly of hot-rolling rotating speed, and the continuous increase of roll body diameter and length, this warm-up mill cartridge can not satisfy existing specification requirement.
In view of this special proposition the present invention.
Summary of the invention
The present invention is directed to the problem that above-mentioned prior art exists, a kind of high-frequency induction heating apparatus that is used for heat-stretching roller, thermal conductance dish or drying cylinder is provided, employing drives heating unit by the high-frequency electromagnetic induction control circuit and exports to the mode that the multistage heating generator carries out induction heating by start pulse signal, high-frequency induction heating apparatus of the present invention is simple in structure, energy consumption is little, the heat efficiency is high, pollution-free, can be widely used on the heat-stretching roller and thermal conductance dish and drying cylinder in the hot equipment complex.
For solving the problems of the technologies described above, the present invention adopts the basic design of technical scheme to be: a kind of high-frequency induction heating apparatus that is used for heat-stretching roller, thermal conductance dish or drying cylinder, comprise heating unit and control unit, described heating unit is the multistage heating generator, comprises the heater coil that is arranged on heat-stretching roller, thermal conductance dish or the drying cylinder; Thereby described control unit is one to drive the high-frequency electromagnetic induction control circuit that forms high-frequency vortex heating on heat-stretching roller, thermal conductance dish or the drying cylinder of heater coil after being heated by controlled high-frequency soft switch power supply in the Power Regulation mode, and described high-frequency electromagnetic induction control circuit produces the high-frequency current of 15KHz-40KHz.
Described multistage heating generator comprises skeleton and magnetic conductor, described heater coil is a solenoid, described skeleton is a hollow columnar body structure, be arranged with the magnetic conductor that several are made by nanoscale ultracrystallite material vertically in the outside of skeleton, on each magnetic conductor, be wound with one group of solenoid.
Described multistage heating generator also comprises the water collar structure of being located on the skeleton.Be generally heating-up temperature and surpass 200 ℃ of needs water collar structures.
Above-mentioned skeleton adopts non-magnet material, as copper and aluminium etc., reduces magnetic loss at work; The multiply high-temperature resistant enamelled wire that solenoid adopts has not only reduced resistance, has also increased conductive area simultaneously; The nanoscale ultracrystallite that magnetic conductor adopts has high magnetic property, low-loss and good operation stability; The water collar structure that skeleton is provided with, under the condition of high temperature, play the effect of cooling heater, not only reduced the internal temperature of heater, as rotating shaft and bearing etc., and the Curie-point temperature that prevents the magnetic conductor amorphous is destroyed, thereby has prolonged the useful life of heater.
Described high-frequency electromagnetic induction control circuit includes a main control loop that connects power frequency supply, the surging that main control loop is provided with series connection successively absorbs EMI loop, rectifier bridge, choking-winding, heater coil and a frequency-variable controller, wherein, in this main control loop, one energy storage capacitor is parallel to heater coil, and a smoothing capacity is parallel to choking-winding.
Described high-frequency electromagnetic induction control circuit also includes the control circuit in parallel with main control loop, described control circuit comprises master cpu, master cpu is parallel to the voltage input end of described main control loop by an electric power loop, master cpu successively by oscillation circuit, drive the loop and be connected in frequency-variable controller, described driving circuit controls frequency-variable controller conducting or end.
Master cpu connects one respectively in order to receive trigger control circuit, a synchronous loop and an over-voltage detection circuit of external control signal, wherein, synchronization loop receives the signal of heater coil one end, the signal of the reception heater coil other end simultaneously in parallel with over-voltage detection circuit.
Master cpu receives and handles the signal that trigger control circuit, synchronization loop and over-voltage detection circuit are sent here, provides start pulse signal by driving the loop for frequency-variable controller, thus the control of conversion controller.
The pulse signal output of the present invention by the control power frequency supply to be offering the multistage heating generator, thereby improves the control precision of heat-stretching roller and thermal conductance dish and drying cylinder surface temperature, solve the process quality issue that causes because of local temperature is too high effectively.Another purpose of design is that the control mode that adopts electromagnetism heating and accumulation of energy to combine can improve heating power, play the effect that cuts down the consumption of energy.
As above content, the advantage and the beneficial effect of warm-up mill cartridge of the present invention are:
1, exports to offer multisection type calandria heat energy by control wave, can improve the controllability and the local temperature difference of heat-stretching roller and thermal conductance dish and drying cylinder surface temperature;
2, the control mode that adopts electromagnetism heating and accumulation of energy to combine can cut down the consumption of energy effectively;
3, the supply frequency of high-frequency electromagnetic induction control circuit is higher, and the frequency band that is adopted can be near the audio frequency separation, thereby reduces work noise;
Thereby 4, make heat-stretching roller and thermal conductance dish and drying cylinder surface can form skin effect and improve the heat efficiency.
For architectural feature of the present invention and effect thereof are had further understanding, enumerate specific embodiment now and be described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 is the structural representation that the present invention is applied to heat-stretching roller;
Fig. 2 is the structural representation that the present invention is applied to thermal conductance dish or drying cylinder;
Fig. 3 is the schematic diagram of described high-frequency electromagnetic induction control circuit;
Fig. 4 is the work wave comparison diagram of described main control loop;
Fig. 5 is described heating unit cross-sectional view.
Embodiment
Extremely shown in Figure 5 as Fig. 1, a kind of high-frequency induction heating apparatus that is used for heat-stretching roller, thermal conductance dish or drying cylinder, comprise heating unit 2 and control unit 3, heating unit 2 is for being arranged on the multistage heating generator on heat-stretching roller, thermal conductance dish and the drying cylinder, and control unit 3 is a high-frequency electromagnetic induction control circuit by the heating of soft switch control multistage heating generator.
Multistage heating generator as shown in Figure 5 comprises skeleton 11, solenoid 13, magnetic conductor 12, water collar structure 14, and skeleton 11 is a hollow columnar body structure, adopts non-magnet material such as copper and aluminium etc., to reduce magnetic loss at work.
Be arranged with the magnetic conductor 12 that several are made by nanoscale ultracrystallite material vertically in the outside of skeleton 11, the nanoscale ultracrystallite material of employing has high magnetic property, low-loss and good operation stability.Be wound with one group of solenoid 13 on each magnetic conductor 12, solenoid 13 adopts the multiply high-temperature resistant enamelled wire, not only can reduce resistance, has also increased conductive area simultaneously.Be arranged with water collar structure 14 on the skeleton 11, under the condition of high temperature, can play the effect of cooling calandria, both can reduce the calandria internal temperature, can prevent that again the mount pad of magnetic conductor 12 is destroyed.Solenoid 13 is connected with control unit 3, gives heat-stretching roller or thermal conductance dish and drying cylinder heating by the heat conduction of skeleton and magnetic conductor.
Embodiment one, extremely shown in Figure 5 as Fig. 1, Fig. 3, heat-stretching roller of the present invention comprises heating unit 2 and control unit 3, heating unit 2 is for being arranged on the multistage heating generator on the heat-stretching roller, control unit 3 is a high-frequency electromagnetic induction control circuit by the heating of soft switch control multistage heating generator, by the add thermal control of control unit realization to heat-stretching roller.Heat-stretching roller has a roller that can axially rotate 1, and roller 1 drives by mounting flange and is connected in driver element, and driver element adopts reducing motor.
Embodiment two, and as shown in Figure 2, the present invention is applied to be provided with thermal conductance dish or drying cylinder 1 ' on a kind of thermal conductance dish or the drying cylinder in rotating shaft, and thermal conductance dish or drying cylinder 1 ' nested inside heating unit 2 are by the add thermal control of control unit 3 realizations to thermal conductance dish or drying cylinder 1 '.
The heating unit that is used for the foregoing description as shown in Figure 5, the multistage heating generator comprises skeleton 11, solenoid 13, magnetic conductor 12, water collar structure 14, skeleton 11 is a hollow columnar body structure, adopts non-magnet material such as copper and aluminium etc., to reduce magnetic loss at work.Be arranged with the magnetic conductor 12 that several are made by nanoscale ultracrystallite material vertically in the outside of skeleton 11, the nanoscale ultracrystallite material of employing has high magnetic property, low-loss and good operation stability.12 are wound with one group of solenoid 13 on each magnetic conductor, and the multiply high-temperature resistant enamelled wire that solenoid 13 adopts not only can reduce resistance, has also increased conductive area simultaneously.Be arranged with water collar structure 14 on the skeleton 11, under the condition of high temperature, can play the effect of cooling calandria, both can reduce the calandria internal temperature, can prevent that again the mount pad of magnetic conductor 12 is destroyed.
As shown in Figure 3, the high-frequency electromagnetic induction control circuit includes a main control loop that connects AC power, the surging that main control loop is provided with series connection successively absorbs EMI loop, rectifier bridge, choking-winding L2, heater coil L1 and a frequency-variable controller IGBT, one energy storage capacitor C3 is parallel to heater coil L1, a choking-winding L2 smoothing capacity C2 in parallel.
Described high-frequency electromagnetic induction control circuit also includes the control circuit in parallel with main control loop, described control circuit comprises master cpu, master cpu is parallel to the voltage input end of described main control loop by an electric power loop, master cpu successively by oscillation circuit, drive the loop and be connected in frequency-variable controller IGBT, described driving circuit controls frequency-variable controller IGBT conducting or end.
Master cpu connects one respectively in order to receive trigger control circuit, a synchronous loop and an over-voltage detection circuit of external control signal, wherein, synchronization loop receives the signal of heater coil L1 one end, the signal of the reception heater coil L1 other end simultaneously in parallel with over-voltage detection circuit.
Master cpu receives and handles the signal that trigger control circuit, synchronization loop and over-voltage detection circuit are sent here, provides start pulse signal by driving the loop for frequency-variable controller IGBT, thus control of conversion controller IGBT.
Described high-frequency electromagnetic induction control circuit produces the high-frequency current of 15KHz-40KHz.
During work, adopt the high-frequency electromagnetic induction control circuit of soft switch control electric energy to be provided and to produce the high-frequency current that frequency is 15KHz～40KHz,, thereby can make its work noise less owing to this audio range frequency is near the audio frequency separation to the multistage heating generator.
Circuit diagram as shown in Figure 3, the power supply of power frequency 50Hz at first absorb the EMI loop through surging, by rectifier bridge alternating current are transformed into direct current then, the rectangular pulse driving that frequency-variable controller IGBT is sent by driving the loop by master cpu.This Power Regulation mode is as follows:
When frequency-variable controller IGBT conducting, the current value that flows through choking-winding L2 improves rapidly;
When frequency-variable controller IGBT ended, series resonance took place in choking-winding L2 and energy storage capacitor C3, and this moment, the C utmost point of frequency-variable controller IGBT produced a high-voltage pulse over the ground;
Through after a while, when this pulse was reduced to zero, driving pulse was added to frequency-variable controller IGBT once more and goes up and make it conducting.
Above-mentioned interim process circulates again and again.
In said process, the signal that master cpu is sent trigger control circuit, synchronization loop and over-voltage detection circuit here compares analysis, output signal to oscillation circuit then, and, it is circulated between conducting and the state that ends by driving the loop for frequency-variable controller IGBT provides start pulse signal.
As shown in Figure 4, the variation of Control current of the present invention, as follows:
In t1 to the t2 time period, when rectangular pulse adds to the G utmost point of variable frequency control IGBT, the IGBT saturation conduction, this moment, current i 1 flow through heater coil L1 from power supply, because coil induction reactance does not allow current break, so rise with linearity in t1 to t2 time period current i 1.
Pulse finishes when t2, and IGBT ends, and same current i 1 can not become 0 immediately owing to the induction reactance effect, therefore is actually energy storage capacitor C3 in charging, promptly produces charging current i2.
When t3, the electric charge of energy storage capacitor C3 is full of, this moment, current value was 0, the magnetic field energy of heater coil L1 all transfers the electric field energy of energy storage capacitor C3 to, when negative right positive field, left side state of value occurring at the two ends of energy storage capacitor C3, circuit reaches its crest voltage, and promptly the voltage between CE the two poles of the earth of IGBT is the result of " flyback pulse peak pressure+supply voltage ".
In t3 to the t4 time period, energy storage capacitor C3 is by heater coil L1 discharge off, and current i 3 reaches maximum, this moment energy storage capacitor C3 two ends loss of voltage, electric energy wherein all transfers the magnetic field energy among the heater coil L1 again to.
Based on identical induction reactance effect, current i 3 can not become 0 immediately, so the electromotive force at heater coil L1 two ends is reverse, promptly the current potential at heater coil L1 two ends is in the positive right negative state in a left side, and energy storage capacitor C3 can not continue reverse charging and reflux formation current i 4.
When t4, second pulse begins to arrive, but this moment IGBT UE for just, UC is in anti-inclined to one side state, so IGBT can not conducting for negative.Treat that current i 4 is reduced at 0 o'clock, the magnetic field energy among the heater coil L1 has been put, and IGBT just begins conducting for the second time with generation current i 5 during promptly to t5, and repeats the process of i1 to i4 time period.
As mentioned above, just produced high frequency pulse AC on the heater coil L1.
VCE voltage change process among the described frequency-variable controller IGBT is:
When static state, UC is the DC power supply of input power supply behind over commutation, in t1 to the t2 time period, and the IGBT saturation conduction, UC is current potential closely.
In t4 to the t5 time period, UC is a negative pressure; In t2 to the t4 time period, also be the free-running half period of LC, crest voltage appears on the UC, and UC reaches maximum when t3.
Can draw by above circuit and waveform analysis:
1, at the high-frequency current of i1 to i4 time current i 1 only being arranged in the cycle is the energy that power supply is supplied with heater coil L1, so the size of current i 1 just directly determines the size of heating power, pulse duration is big more simultaneously, and the time period of t1 to t2 is just long more, and current i 1 is just big more.Therefore, want to regulate the size of heating power, only need the regulating impulse width to get final product.
2, occurring crest voltage at LC in free-running time half period, is the deadline of IGBT, also is the time that switching pulse does not have arrival, and this time relationship can not misplace.Switching pulse arrives in advance if peak pulse does not also disappear, and very big conducting electric current will occur to make that IGBT is burnt out, so must make behind the forward position of switching pulse and the peak pulse along synchronised.
The pulse signal output of the present invention by the control power frequency supply to be offering the multistage heating generator, thereby improves the control precision of heat-stretching roller and thermal conductance dish and drying cylinder surface temperature, solve the process quality issue that causes because of local temperature is too high effectively.Another purpose of design is that the control mode that adopts electromagnetism heating and accumulation of energy to combine can improve heating power, play the effect that cuts down the consumption of energy.
Claims (7)
1. high-frequency induction heating apparatus that is used for heat-stretching roller, thermal conductance dish or drying cylinder, comprise heating unit and control unit, it is characterized in that: described heating unit is the multistage heating generator, comprises the heater coil that is arranged on heat-stretching roller, thermal conductance dish or the drying cylinder; Described control unit is one to drive heater coil heat hot draw roll, thermal conductance dish or drying cylinder by controlled high-frequency soft switch power supply in the Power Regulation mode, thereby form the high-frequency electromagnetic induction control circuit of high-frequency vortex heating on the heat-stretching roller after being heated, thermal conductance dish or the drying cylinder, described high-frequency electromagnetic induction control circuit produces the high-frequency current of 15KHz-40KHz.
2. a kind of high-frequency induction heating apparatus that is used for heat-stretching roller, thermal conductance dish or drying cylinder according to claim 1, it is characterized in that: described multistage heating generator comprises skeleton and magnetic conductor, described heater coil is a solenoid, described skeleton is a hollow columnar body structure, be arranged with the magnetic conductor that several are made by nanoscale ultracrystallite material vertically in the outside of skeleton, on each magnetic conductor, be wound with one group of solenoid.
3. a kind of high-frequency induction heating apparatus that is used for heat-stretching roller, thermal conductance dish or drying cylinder according to claim 2 is characterized in that: described multistage heating generator also comprises the water collar structure of being located on the skeleton.
4. a kind of heat-stretching roller that is used for according to claim 1, the high-frequency induction heating apparatus of thermal conductance dish or drying cylinder, it is characterized in that: described high-frequency electromagnetic induction control circuit includes a main control loop that connects power frequency supply, main control loop comprises that surging absorbs the EMI loop, rectifier bridge, choking-winding and a frequency-variable controller, surging absorbs the EMI loop, rectifier bridge, choking-winding, the setting of connecting successively of heater coil and frequency-variable controller, wherein, in this main control loop, also comprise an energy storage capacitor that is arranged in parallel with heater coil, a smoothing capacity that is arranged in parallel with choking-winding.
5. a kind of high-frequency induction heating apparatus that is used for heat-stretching roller, thermal conductance dish or drying cylinder according to claim 4, it is characterized in that: described high-frequency electromagnetic induction control circuit also includes the control circuit in parallel with main control loop, described control circuit comprises master cpu, master cpu is parallel to the voltage input end of described main control loop by an electric power loop, master cpu successively by oscillation circuit, drive the loop and be connected in frequency-variable controller, the rectangular pulse control of conversion controller conducting that send in described driving loop or end.
6. a kind of high-frequency induction heating apparatus that is used for heat-stretching roller, thermal conductance dish or drying cylinder according to claim 5, it is characterized in that: master cpu connects one respectively in order to receive trigger control circuit, a synchronous loop and an over-voltage detection circuit of external control signal, wherein, synchronization loop receives the signal of heater coil one end, the signal of the reception heater coil other end simultaneously in parallel with over-voltage detection circuit.
7. a kind of high-frequency induction heating apparatus that is used for heat-stretching roller, thermal conductance dish or drying cylinder according to claim 6, it is characterized in that: master cpu receives and handles the signal that trigger control circuit, synchronization loop and over-voltage detection circuit are sent here, provide start pulse signal by driving the loop for frequency-variable controller, thus the control of conversion controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102593763A CN101707818B (en) | 2008-12-22 | 2009-12-22 | High-frequency induction heating device for thermally-drawing roller, heat-conducting disc or drying drum |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810240280 | 2008-12-22 | ||
| CN200810240280.8 | 2008-12-22 | ||
| CN2009102593763A CN101707818B (en) | 2008-12-22 | 2009-12-22 | High-frequency induction heating device for thermally-drawing roller, heat-conducting disc or drying drum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101707818A CN101707818A (en) | 2010-05-12 |
| CN101707818B true CN101707818B (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009102593763A Expired - Fee Related CN101707818B (en) | 2008-12-22 | 2009-12-22 | High-frequency induction heating device for thermally-drawing roller, heat-conducting disc or drying drum |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101977457A (en) * | 2010-11-11 | 2011-02-16 | 浙江四通化纤有限公司 | Special high-frequency heater for hot drawing roller |
| CN102427625B (en) * | 2011-09-20 | 2015-07-15 | 美的集团股份有限公司 | Power choking coil and electromagnetic induction heater adopting same |
| CN102737812A (en) * | 2012-07-25 | 2012-10-17 | 昆山达功电子有限公司 | High-power high-current choking winding |
| CN110409060A (en) * | 2019-08-27 | 2019-11-05 | 绍兴励达无纺布有限公司 | A kind of production technology of high-strength polyester spunbond geotextiles |
| CN114242309B (en) * | 2021-12-20 | 2024-01-09 | 中科(湖南)先进轨道交通研究院有限公司 | Construction method of bending-resistant cable for railway |
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